In IGPX, two teams driving high-tech fighting machines compete in a futuristic race called the Immortal Grand Prix. The tournament pits two groups, Team Sledge Mamma and underdogs Team Satomi, against each other in a 12-round battle in which the teams much destroy their opponent's mecha (robotic fighting machines) using various weaponry. The pilots are shielded inside a pod called a "hide shell," but once the mech is destroyed, the hide shell is ejected. After the 12 rounds, the two best teams advance to the finals. The starring role of Takeshi Jin is voiced by Haley Joel Osment of The Sixth Sense.